<template>
  <div class="home">
    <div id="app">
      <div class="model" v-show="model" @click="model = false">
        <div class="model-show">
          <img :src="modelSrc" alt>
        </div>
      </div>
      <div style="display:flex;justify-content:center;align-items:center;">
        <div class="cut">
          <vue-cropper
            ref="cropper"
            :img="option.img"
            :output-size="option.size"
            :output-type="option.outputType"
            :info="true"
            :full="option.full"
            :can-move="option.canMove"
            :can-move-box="option.canMoveBox"
            :fixed-box="option.fixedBox"
            :original="option.original"
            :auto-crop="option.autoCrop"
            :auto-crop-width="option.autoCropWidth"
            :auto-crop-height="option.autoCropHeight"
            :center-box="option.centerBox"
            @real-time="realTime"
            :high="option.high"
            @img-load="imgLoad"
          ></vue-cropper>
        </div>

        <div
          class="show-preview"
          :style="{'width': previews.w + 'px', 'height': previews.h + 'px',  'overflow': 'hidden', 'margin': '5px'}"
        >
          <div :style="previews.div">
            <img :src="previews.url" :style="previews.img">
          </div>
        </div>
      </div>

      <div class="test-button">
        <label class="btn" for="uploads">upload</label>
        <input
          type="file"
          id="uploads"
          style="position:absolute; clip:rect(0 0 0 0);"
          accept="image/png, image/jpeg, image/gif, image/jpg"
          @change="uploadImg($event, 1)"
        >
        <button @click="startCrop" v-if="!crap" class="btn">start</button>
        <button @click="stopCrop" v-else class="btn">stop</button>
        <button @click="clearCrop" class="btn">clear</button>
        <button @click="refreshCrop" class="btn">refresh</button>
        <button @click="changeScale(1)" class="btn">+</button>
        <button @click="changeScale(-1)" class="btn">-</button>
        <button @click="rotateLeft" class="btn">rotateLeft</button>
        <button @click="rotateRight" class="btn">rotateRight</button>
        <button @click="finish('base64')" class="btn">preview(base64)</button>
        <button @click="finish('blob')" class="btn">preview(blob)</button>
        <a @click="down('base64')" class="btn">download(base64)</a>
        <a @click="down('blob')" class="btn">download(blob)</a>
        <div style="display:block; width: 100%;">
          <label class="c-item">
            <span>上传图片是否显示原始宽高 (针对大图 可以铺满)</span>
            <input type="checkbox" v-model="option.original">
            <span>original: {{ option.original}}</span>
          </label>
          <label class="c-item">
            <span>能否拖动图片</span>
            <input type="checkbox" v-model="option.canMove">
          </label>
          <label class="c-item">
            <span>能否拖动截图框</span>
            <input type="checkbox" v-model="option.canMoveBox">
            <span>canMoveBox: {{ option.canMoveBox}}</span>
          </label>
          <label class="c-item">
            <span>截图框固定大小</span>
            <input type="checkbox" v-model="option.fixedBox">
            <span>fixedBox: {{ option.fixedBox}}</span>
          </label>
          <label class="c-item">
            <span>是否输出原图比例的截图</span>
            <input type="checkbox" v-model="option.full">
            <span>full: {{ option.full}}</span>
          </label>
          <label class="c-item">
            <span>是否自动生成截图框</span>
            <input type="checkbox" v-model="option.autoCrop">
            <span>autoCrop: {{ option.autoCrop}}</span>
          </label>
          <label class="c-item">
            <span>是否根据dpr生成适合屏幕的高清图片</span>
            <input type="checkbox" v-model="option.high">
            <span>high: {{ option.high}}</span>
          </label>
          <label class="c-item">
            <span>截图框是否限制在图片里(只有在自动生成截图框时才能生效)</span>
            <input type="checkbox" v-model="option.centerBox">
            <span>centerBox: {{ option.centerBox}}</span>
          </label>
          <label class="c-item">
            <p>输出图片格式</p>
            <label>
              jpg
              <input type="radio" name="type" value="jpeg" v-model="option.outputType">
            </label>
            <label>
              png
              <input type="radio" name="type" value="png" v-model="option.outputType">
            </label>
            <label>
              webp
              <input type="radio" name="type" value="webp" v-model="option.outputType">
            </label>
          </label>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { VueCropper } from "vue-cropper";
export default {
  name: "index1-4",
  components: {
    VueCropper
  },
  data() {
    return {
      model: false,
      modelSrc: "",
      crap: false,
      previews: {},
      option: {
        img: "https://qn-qn-kibey-static-cdn.app-echo.com/goodboy-weixin.PNG",
        size: 1,
        full: false,
        outputType: "png",
        canMove: true,
        fixedBox: false,
        original: false,
        canMoveBox: true,
        autoCrop: true,
        // 只有自动截图开启 宽度高度才生效
        autoCropWidth: 200,
        autoCropHeight: 150,
        centerBox: false,
        high: true
      },
      show: true
    };
  },
  methods: {
    startCrop() {
      // start
      this.crap = true;
      this.$refs.cropper.startCrop();
    },
    stopCrop() {
      //  stop
      this.crap = false;
      this.$refs.cropper.stopCrop();
    },
    clearCrop() {
      // clear
      this.$refs.cropper.clearCrop();
    },
    refreshCrop() {
      // clear
      this.$refs.cropper.refresh();
    },
    changeScale(num) {
      num = num || 1;
      this.$refs.cropper.changeScale(num);
    },
    rotateLeft() {
      this.$refs.cropper.rotateLeft();
    },
    rotateRight() {
      this.$refs.cropper.rotateRight();
    },
    finish(type) {
      // 输出
      // var test = window.open('about:blank')
      // test.document.body.innerHTML = '图片生成中..'
      if (type === "blob") {
        this.$refs.cropper.getCropBlob(data => {
          console.log(data);
          var img = window.URL.createObjectURL(data);
          this.model = true;
          this.modelSrc = img;
        });
      } else {
        this.$refs.cropper.getCropData(data => {
          this.model = true;
          this.modelSrc = data;
        });
      }
    },
    // 实时预览函数
    realTime(data) {
      this.previews = data;
      console.log(data);
    },

    finish2(type) {
      this.$refs.cropper2.getCropData(data => {
        this.model = true;
        this.modelSrc = data;
      });
    },
    finish3(type) {
      this.$refs.cropper3.getCropData(data => {
        this.model = true;
        this.modelSrc = data;
      });
    },
    down(type) {
      // event.preventDefault()
      var aLink = document.createElement("a");
      aLink.download = "demo";
      // 输出
      if (type === "blob") {
        this.$refs.cropper.getCropBlob(data => {
          this.downImg = window.URL.createObjectURL(data);
          aLink.href = window.URL.createObjectURL(data);
          aLink.click();
        });
      } else {
        this.$refs.cropper.getCropData(data => {
          this.downImg = data;
          aLink.href = data;
          aLink.click();
        });
      }
    },

    uploadImg(e, num) {
      //上传图片
      // this.option.img
      var file = e.target.files[0];
      if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) {
        alert("图片类型必须是.gif,jpeg,jpg,png,bmp中的一种");
        return false;
      }
      var reader = new FileReader();
      reader.onload = e => {
        let data;
        if (typeof e.target.result === "object") {
          // 把Array Buffer转化为blob 如果是base64不需要
          data = window.URL.createObjectURL(new Blob([e.target.result]));
        } else {
          data = e.target.result;
        }
        if (num === 1) {
          this.option.img = data;
        } else if (num === 2) {
          this.example2.img = data;
        }
      };
      // 转化为base64
      // reader.readAsDataURL(file)
      // 转化为blob
      reader.readAsArrayBuffer(file);
    },
    imgLoad(msg) {
      console.log(msg);
    }
  }
};
</script>
<style lang="less" scoped>
* {
  margin: 0;
  padding: 0;
}

.cut {
  width: 500px;
  height: 500px;
  margin: 30px;
}

.c-item {
  max-width: 800px;
  margin: 10px auto;
  margin-top: 20px;
}

.content {
  margin: auto;
  max-width: 1200px;
  margin-bottom: 100px;
}

.test-button {
  display: flex;
  flex-wrap: wrap;
  align-content: center;
  justify-content: center;
}

.btn {
  display: inline-block;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  background: #fff;
  border: 1px solid #c0ccda;
  color: #1f2d3d;
  text-align: center;
  box-sizing: border-box;
  outline: none;
  margin: 20px 10px 0px 0px;
  padding: 9px 15px;
  font-size: 14px;
  border-radius: 4px;
  color: #fff;
  background-color: #50bfff;
  border-color: #50bfff;
  transition: all 0.2s ease;
  text-decoration: none;
  user-select: none;
}

.des {
  line-height: 30px;
}

code.language-html {
  padding: 10px 20px;
  margin: 10px 0px;
  display: block;
  background-color: #333;
  color: #fff;
  overflow-x: auto;
  font-family: Consolas, Monaco, Droid, Sans, Mono, Source, Code, Pro, Menlo,
    Lucida, Sans, Type, Writer, Ubuntu, Mono;
  border-radius: 5px;
  white-space: pre;
}

.show-info {
  margin-bottom: 50px;
}

.show-info h2 {
  line-height: 50px;
}

/*.title, .title:hover, .title-focus, .title:visited {
        color: black;
      }*/

.title {
  display: block;
  text-decoration: none;
  text-align: center;
  line-height: 1.5;
  margin: 20px 0px;
  background-image: -webkit-linear-gradient(
    left,
    #3498db,
    #f47920 10%,
    #d71345 20%,
    #f7acbc 30%,
    #ffd400 40%,
    #3498db 50%,
    #f47920 60%,
    #d71345 70%,
    #f7acbc 80%,
    #ffd400 90%,
    #3498db
  );
  color: transparent;
  -webkit-background-clip: text;
  background-size: 200% 100%;
  animation: slide 5s infinite linear;
  font-size: 40px;
}

.test {
  height: 500px;
}

.model {
  position: fixed;
  z-index: 10;
  width: 100vw;
  height: 100vh;
  overflow: auto;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.8);
}

.model-show {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
}

.model img {
  display: block;
  margin: auto;
  max-width: 80%;
  user-select: none;
  background-position: 0px 0px, 10px 10px;
  background-size: 20px 20px;
  background-image: linear-gradient(
      45deg,
      #eee 25%,
      transparent 25%,
      transparent 75%,
      #eee 75%,
      #eee 100%
    ),
    linear-gradient(45deg, #eee 25%, white 25%, white 75%, #eee 75%, #eee 100%);
}

.c-item {
  display: block;
  user-select: none;
}

@keyframes slide {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: -100% 0;
  }
}
</style>

